Attachment for sewing machines



April 8 1924. 1,489,391"

A. B. MATTINGLY v ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 19,1918 s sheets-sheet 1 Inventor:

April 8, 1924. 1,489,391

, A. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 19,1918 6 Sheets-Sheet 5 I [W m FEM: jgim 0 66 /35 3 v 56 .111- ,i

April 8, 1924. r 1,489,391

A. B. MATTINGLY ATTACHMENT FOR SEWING MAqHINEs.

E Inventor:

April 8,. 1924. 1,489,391

A. B. MATTINGLYv ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 19.1918 6. Sheets-Sheet 5 inventor:

April 8, 1924. 1,489,391

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 19,1918 e Sheets-$11961. e

- no rs uvwx Fatented Apr. 8, 1924.

UNITED STATES PATENT orrics.

ALBERTUS B. IIIATTIN'GLY, OF NEW YORK, N. Y.

ATTACHMENT FOR- SEWING MACHINES.

Application filed February 19, 1918, Serial No. 218,076. RenewedSeptember 1, 1923.

To all whom it may concern:

Be it known that I, Atnnnros B. MAT- TlNGLY, a citizen of the UnitedStates, and

resident of NewYor-k, in the county of New York and State of New York,have invented certain new and useful Improvements in Attachments forSewing Machines, of which the following is a specification.

This invention relates to an improvement in attachments for sewingmachines, and the inventor is aware that the device is of a naturesimilar to that disclosed in British Letters Patent No. 17,153 of 1905,to Hills, and United States Patents No. .l12,081, to Fletcher, No.446,736, to Fletcher, No. 990,601, to. Seward, and No. 990,610, toTurck, and the object is to overcomesome of the objectionable featuresof these devices and to tt'urther improve the same.

The principal objects are to provide a device ofthis character toautomatically cut or slit the cloth just in advance of the stitching orbindingof the button-hole so that the needle may pass alternatelythrough the cloth and then through the slit or cut, thus causing thethread to be brought through the cut and make a perfect binding of theraw edges of the work, and to provide a means for positively actuatingthe knife with a quick and decisive action at the proper periods to makethe cut the proper length according to the length of the buttonholes,and to have the length of cut automatically adjust itself with theadjusting of the device for the length of the button-hole.

The further objects are to provide a device of this character which willprovide a means for more evenly distributing the stitches around thecontour of the buttonhole than has heretofore been accomplished, and toprovide means whereby a more perfect adjustment of the cutting-device asregards its alinement relative to the needle of the sewing machine isobtained.

The still further objects are to provide a device or". this characterwhich by its construction is considerably reduced in height and therebydoing away withthe necessity of removing the face plate of the sewingmachine to adjust the presser bar, and by the construction of the baseplate obviating the necessity of removing the feed dogs of the sewingmachine.

The still further objects are to provide an improved ratchet device foreffecting the lateral vibration of the work clamp, to pro duce'theoverstitch of the edge of the button-hole, and to form other parts ofthe device by the stamping process, screw machines, which is thecheapest method of tion; but I do not wish to confine myself to theexact construction shown, as I have, for the sake of clear illustration,exaggerated some of the parts, especially in the side elevations, andthe cam faces of the yoke upon which the eccentric cam works.

In the accompanying drawings, showing one embodiment of myinvention,Figure 1 is a plan view of the device; Fig. 2 is a similar View to Fig.1, partly broke'nawayto show the revolving disk and thecam for movingthe work clamp; Fig. 3 is a similar view to Fig. 2, with the revolvingdisk re moved; Fig. 4c is a similar view to Fig. 3 and a section takenon line 1-4 of Fig. 5 5 is a side elevation; Fig. 6 s sectional viewtaken on the line 6 j 6 of Fig. 5; 7 is a similar view to Fig. 6, withthe knife and its operating means removed; Fig. 8 is a similar View toFig. 7, with the work clamp removed showing the vibrating means; Fig. 9isasimilar view to Fig. 8, with the vibrating means removed; FigflO is acentral vertical sectional view; Fig. 11 is a perspective view of theoperating lever: Fig. 12 is a, detail plan of the vibrator; Fig. 13 isan end elevation of the vibrator; Fig. 14 is a side elevation of thevibrator; Fig. 15 1s a perspective view of the vi rater carrier; Fig. 16is a plan of the sup porting plate; Fig. 1? ma bottom plan ofthcrevolving disk; Fig. 18 is a central section of the revolving disk; Fig.19 is a plan of the can] plate; Fig. 2G is a side elevation of the camplate; Fig. 21 is a plan of the knife carrier; Fig. 22 is side elevationof the knife carrier; Fig. 23 is a plan of the rice the oaeratin lever 4which rocks knife shield and integral therewith the stripper plate forthe needle and the guide for the work clamp; Fig. 24 is a side elevationof Fig. 23; Fig. 25 is a plan of the work clamp; Fig. 26 is a plan ofthe ratchetcam; Fig. 27 is a section of the ratchet cam; Fig. 28 is aplan of the pawl plate of the vibrator; Fig. 29 is a plan of the springpawl for operating the ratchet cam; Fig. 30 is a bottom plan of the cammember showing the cam for operating the knife and the race cam forcontrolling the work clamp; Fig. 31 is a plan of the upper portion ofthe assembling stud carrying the.

brake springs; Fig. 32 is a side elevation of Fig. 31; 33 is a plan ofthelower portion of the assembling stud and Fig. 34 is a side elevationof Fig. 33; Fig. 35 is a plan of the linkage for aliningv the work clampand knife with the needle; Fig. 36 is a diagrammatic view showing themovement of the work clamp and cam when the operating cam moves in acircular motion; Fig. 37 is a view similar to Fig. 36, but showing thecam moving in an oval path.

I provide a suitable base plate 1. which is secured to a rear throatplate 2 of the sewing machine in any suitable manner, but preferablyscrewed thereto, as shown in Fig. 1 of the drawings.

The base plate 1. is provided with an ear 3, which is upwardly turnedand caron a pivot 5 formed of a large screw, the lever 4 being providedwith a bifurcated end 6 which engages the shank of the screw oi? thetightening collar of the needle bar of the sewing machine. The lever 4is further provided with an arc-shaped slot 7, through which passes thearm of the friction clutch, which receives its movement from the screw 8in the ear 9 and the rear end 10 of the slot 7. The screw 8 isfrictionally held from turning by the pressure of the spring 11 againstits head and the ear 9. The lever- 4 is further provided with an arm ordownward extension which has a bifurcated end 12 which operates the pawl13 and the pawl plate 14 by the lever 15, which is mounted on the throatplate 2 by means of a body screw forming a pivot 16. In the forward endof the lever 15 is a pin 17 (see Figs. 9, 28 and 29) which operates thepawl 13 and the pawl plate 14 through the slots 18 and 19.

The base plate 1 is further provided with a pivot or stud 20' made up oftwo parts 21 and 22. The lower portion 21 of the stud is hollow and hasits upper and lower ends turned down, leaving a body portion 23 which isslotted on opposite sides forming grooves 24 for the reception of theextensions 25 of the part 22, and a washer 26 is forced on to the lowerpart of the part 21. The Washer 26 forms a substantial base for holdingthe stud in a vertical position on the base lists which is done b thescrew 27 passing through the washer and the base plate 1 and the hollowpart 21 and l eing screwed into the part 22, which locks all of theseveral parts assembled on the stud in position by its head, in whichare secured two springs 29 which act as friction brakes in connectionwith the cam member 30, which is driven by a friction device (see Figs.4 and 10) composed. of a friction ring 31 supported by a flange on thecam member in the recess 33 of the ring is pivoted a friction dog 34,which is normally held in contact with cam member 3'0 by a spring 35.The lever 36 of the dog passes through an opening or slot 7 in. theoperating lever 4 and is operated by the screw and the rear end of theslot 7, the screw 8 forcing the dog and ring backwards and relieving thepressure on the cam member. The springs 29 bearing against the surface37 prevent the cam member from turning and the rear end of the slotforces the dog forward and causes the nose 38 to bite or grip thesurface 39 of the cam member 30 and revolve the same a predeterminedamount, which is regulated by the screw 8. The plate 40 secured to thecam member 30 keeps the ring in position.

Botatably mounted upon the stud 20 and supported by the washer 26 arethe pawl 13 and the pawl plate 14 (which are swung in an are by the end12 of the lever 4 through the lever 15 and its pin 17 in a forward andbackward movement). Rotatably mounted upon the stud 20 and resting uponthe pawl plate 14 is a ratchet cam 41, which receives a step by steprotary movement from the upturned end 138 of pawl 13 extending through aslot in plate 14 and engaging in turn the notches 137 of ratchet 41 andwhich operates the vibrator 56, which has its support on the pawl plateand is pivoted on the pin 51 of the L-shaped member 52.

The base plate 1 is further provided with a cut-away portion 43 in whichis located a linked member 44 having a slot- 45 and a circular opening46 which fits the head of the screw 27 which acts as a pivot. Secured tothe forward end of the linked member 44 by a pivot is a link 47 with anupturned. end 48, which is tapped for the screw 49 which passes througha hole in the ear 3 and is provided with a lock nut 50. By turning thescrew 49 to pull or push the link 47. the slot 45 can be made to line upperfectly with the needle and the stud 20 and held in this position bythe lock nut 50. The slot 45 is for receiving the bottom end of the pin51 of the Lashaped member 52. which is provided with a slot 53 foradjusting it upon the base plate 1 by the screw 54, and it is providedwith an upturned ear for adjusting it while the screw 54: is loose. Thepin 51 is tight in the member 52 and its upper end forms a pivot for thevibrator 56, which is connected thereto by the hole 57 in the ear 58,and when assembled the ear 58 is capable of passing wider the pawl 13and pawl plate 14:, while the yoke 59 straddles the ratchet cam andrests upon the pawl plate 14. The L-shaped member 52 is to regulate thewidth of bite of the overstitch which is made by the throw transversemovement of the work clamp, by moving the member 52 so that the pin 51is moved to and from the stud 20. vThe nearerthe pin 51 is to vthe stud20 the greater the movement of the work clamp. r

The vibrator 56 is provided with a pivoted block 60 which fits the innerfaces of the rear yoke 62 of the work clamp 63, which straddles the stud20 and rests on the supporting plate 61, which, working in con junctionwith the cam member 30, keeps the forward part 641 of the work clamp inproper contact with the baseplate 1 and prevents the bottom stripperplate 65 from leaving the slotted way 66 in the base as it is oscillatedby the work clamp in connection with the ears 67.

Thesupporting plate 61 is held in position by resting ontheshoulders 68of the bottom 1 part of the stud 21, which fits the hole 69 providedwith slots through which pass the extensions 25 of the upper part 22 ofthe stud 20 and prevent plate 61 from turning and causing the springs 29to act as friction brakes on the cam member 30. The screw 27 pullingdown on the part 22 pinches the plate 61 between the shoulder 68 and thepart 7 0 of the-upper part 22 of the stud.

Mounted upon the yoke 62 is the guide or shield 71 for the knife carrier72, -having its front end 73 in the form of a stripping plate whichslides in a groove or space 74 formed by a plate. 75, which is forcedinto the upper jaw 76 of the work clamp. The rear end of the shield 71is enlarged, forming a guide 77, by means of the downwardly extendingflanges 78 fitting the yoke 62, which moves back and forth relatively tothe stud 20. The rectangular opening 7 9 is of a width equal to thediameter of the upper part 22 of the stud 20, which passes through itand prevents the shield from moving back and forth but allows its rearend to be drawn laterally of the stud 20 in both directions by the pin80 working in the cam groove 81 formed by the cams 82 and 88 on theunder side of thecam member 30 (thus causing the vibrator to vibrate oroscillate the work clamp in the contour of a button-hole while therevolving disk is moving the work clamp back and forth the length of thebutton-hole).

Mounted upon the guide or shield 71 is the knife carrier 72, which hasits spring portion 84 passing through the openings 85 and-86 of theshield 71. The spring portion 8 1 has its outer end bent upward, withtwo cars 87 forminga pair of jaws for the knife 88, which is held by apin or screw 89. The rear end of the spring portion8 l is formed in arectangular frame or yoke 90 having a flange 91 forming a cam face 92against which the cam 93 secured to the under face of the cam member 30works, and the flexible portion 9 1 insures the keeping of the cam 93and the cam face 92 always in contact. At a predetermined point theflange 91 forming the cam face 92 is cut away or ends at 95, and theyoke is so formed at this point as to havea clearance space 96 toprevent the yoke frame from hitting the cam 93 when the flexible part 91 of the yoke causes the yoke and knife 1 to move quickly back betweenthe strokes of the needle and thus prevent the needle bar from strikingthe knife several times while it is being moved back from under I theneedle bar. caused by the cam 93,v.*hich holds the yoke forward for theproper time, having an abrupt drop 97, so thatwhile it is revolving onthe stud 20 the point 98 passes the point on the cam 92. formed as tonot interfere with the point 92 and this allows the yoke to move backits full stroke at this point, which is ac- This quick movement is J Thepoint 98 is so complished on one of the upward strokes the intersectionof its axes to the rear of the v stud 20. The revolving of the diskrinan oval path is caused by its pivot pin 103 sliding or shifting itsposition in the slot 104 as disc 102 revolves. The shifting of the pinis caused by the pivoted block 105 sliding in the shallow arc-shapedslot 106.

It will be noted that the slot 10% is deeper than the arc-shaped slot106; and thus the pm 103 is prevented from entering the slot 106 as itpasses the slot 106 when the disk 102 is being driven by the drivingplate 101,

which is operatively connected to the disk 102 by the pivoted block 107,which is free to slide in the slot 108 of the driving plate.

The foregoing movement will be more clearly understood by referring toFig. 3, where I have indicated by dotted lines the positions of thepivoted blockand pin and the starting position of the driving plateforeachcycle. To make a button-hole, with the plate.

driving plate in the position indicated in dotted lines 109, the block107 will be at 110 and the pivot pin 103 at 111 and block 105 at 112.Vihen the driving plate reaches the position indicated at 113 the block107 will be at 114: and its center will represent the end of the minorradius of the oval and the block 105 will be at 115 and the pivot pin108 will be almost in the center of the cam While the driving plate ismoving to the position shown in full lines the pivot pin 103 moves alongthe slot 104 to 116 and the block 105 returns to the center line of thecam plate, and as the driving plate continues its circular movement tothe position 109 the block 105 moves over to 117 and back to the centerline of cam plate. Mounted upon the revolving disk is an adjustable cam118 held in position by astud 119 having a rectangular head 120 whichfits the recess 121 and which guides it in its movement. The stud passesthrough a slot 122 and the cam into a screw cap 123, which causes thecam 118 to bind against the disk 02. This cam moves in an oval path, andthe lengths of the axes are changed by the adjustment of the cam on thedisk 102 relative to the pin 103. It will be understood from theforegoing that the reason the cam 118 moves in an oval path instead ofan ellipse is that the slot 106 is arc-shaped, and having its centertowards the front of the attachment causes the pin 103 to be moved toand from the center of the cam plate much faster on the first and lastquarters of its revolution and much slower on the second and thirdquarters of its revolution. This is due to the block 105 movingpartially in the same direction with the pin 103 and also to the sideand back to the center at the same time on the first and last quartersof the revolution, thus forming the pointed end of the oval, and theblock 105 moving in the opposite direction to the pin 103 relative tothe major axis or" the'oval, while returning'on the arc to the center ofthe cam plate on the second and third quarters of its revolution thusforms the circular or butt end of the oval, as indicated by the dottedline 153 in Fig. 3. By the, term oval is to be understood a figuresimilar to an ellipse, but in which the curvature at one end is greaterthan at the other end, similar to the shape of an egg. The cam 118performs the function of the eccentric cam of the patents mentioned inthis specification and produces a more satisfactory result.

' The cam 118 moves the work clamp forward and back from the stud 20 andin line with the needle through the yoke member 12 1, which is securedto the work clamp and is provided with a slot 125 in. which the cam 118is located, and as the cam revolves it works against the face 126 firstto drive the clamp forward and against the face 127 to draw the clampback. The yoke member 12 1 is secured to the work clamp 63 by means ofscrews 128, and the forward end is bifurcated and bent so as to formbearings for the locking member 129 which is formed of a bent wirehaving a central portion 130 which acts in the capacity of a hand leverto operate the two end portions 131 which act upon the spring extensions132 of the upper jaw 63 and which are riveted to the rear yoke 62 of thework clamp.

Mounted on the underside of the base plate 1 (see Figs. 8 and 9) is aspring member 133, which is held in position by the rivets 131 and hasan upwardly extending portion 135 which extends through the opening 136of the pawl plate 1 1 and into the holes 137 of the ratchet cam 11. Thisprevents the ratchet cam from being turned backwards by friction of theend 138 of the pawl slipping out of any one of the holes 137 upon itsbackward movement after it has revolved the ratchet cam one-tenth of aturn.

The base plate is further bent or formed so as to have a raised portion139 through the center thereof, upon which the bottom of the work clampslides and on which is cut the channel or groove 66 for thestripperplate 65, which has an opening 140 somewhat in the shape of a T.Beneath the stripper plate 65 in the base plateis an opening 111 toallow the needle to perform its functions. The raised portion 139 formsa channel or groove 1 12 (see Fig. 10), which allows the free action ofthe feed dogs of the sewing machine and raises the device enough topermit the cutting of the cloth without the knife hitting the dogs onitsdownward stroke.

The operation of the device is very simple. The rear throat plate of thesewing'machine is removed and the device is slipped in its place by theinsertion of the throat plate 2 which is screwed to the device. and theshank of the screw which holds the needle in position passes into thebifurcated end 6 of the lever 41. When the attachment is first put onthe machine the screw 54% and lock nut 50 are loosened and the screw 19turned to bring the knife in line with the needle. The lock nut 50 isthen tigh ened up. This holds the slot 15 in a perfect line with theneedle and then the member can be adjusted for any width of vibrationfor the work clamp. The screw 51 is then tightened and the attachment isready for operation. It will be understood that after the knife has beenonce adjusted for the needle the attachment can be removed if desiredand 7 put back without the knife being readjusted, and th vibratingmovement of the work clamp can also be changed to take more or less bitewhen the attachment is adjusted to make a larger or smaller button-hole,without disturbing the adjust.- ment of the knife.

To make a button-hole, the work clamp is Lil set by operating the sewingmachine until the extreme back position is reached. The lever 130 of thelocking member 129 is then pressed forward, (that is, in the directionof the needle), and forces the ends 131 backwards and thus relieves thepressure of the springs 132, which allows the jaws of the work clamp toopen. The cloth is inserted between the jaws and the lever 130 pushedback to its original position, thus causing the upper jaw to force thcloth down into the concave opening in the lower jaw, and at the sametime the flanges 1&3 of the up per jaw prevent the slipping of the clothon the lower 'jaw and thus causes the cloth to be stretched like a drumhead. With the work clamp in this position the knife is in the dottedposition shown in Fig. 5, and upon running the machine the needle barstrikes the top of the knife and forces it through the cloth each timethe needle descends, until the work clamp is almost at its xtremeforward position, when the cam 93 is at the point where the point ornose 98 passes the point 95. The flexible portion 94: of the yoke causesthe yoke to move swiftly back and draw the knife out of line with theneedle bar before it has time to descend and strike it again, (asshownin full lines in Fig. 5), thus preventing further cutting, and the kniferemains in this position until the button-hole is finished.

The stud 20 is the pivot center upon which the work clamp is oscillatedby the vibrator 56. With each upward movement of the needle bar thelever a is raised, which in turn swings the pawl plate 14: sutlicientlyto have the pawl. 138 act on one of the holes 137 of the ratchet cam andrevolve it one-tenth of a revolution, which causes one of the pointedcam faces 14:3 to act on one side of the yoke 59 and cause the vibratorto swing to one side of its pivot 51. The face 14% prevents anyoverthrow of the vibrator. The next stroke of the needle causes one ofthe faces 113 to act on the opposite side of the yoke 59 and swing it inthe opposite direction. This movement of the vibrator causes the workclamp to be oscillated on its pivot 20, such motion being transmittedthrough the block of the vibrator. While the vi brator is oscillatingthe work clamp in one direction or the other with every stroke of theneedle to make the needle pass first through the cloth and then throughthe cut, the oval cam is. slowly shoving the work clamp forward thelength of the button-hole, the speed of the forward movement beingregulated by the screw 8, which strikes the arm or lever 36 of thefriction clutch and forces the ring 31 back a predetermined amount,(upon the downward stroke of the needle). The rear end 10 of the slot 7,

upon reaching the arm 86, (on the upward movement of the needle) forcesthe ring'to move forward and the nose 38 to bite into the cam member 30and cause it and the revolving disk to revolve, which causes the therevolution of the revolving disk, works against the face 127 it causesthe work clamp to be drawn backwards. The revolving of the cam member 30causes the pin 80 to shift its position while the button-hole is beingmade. This is due to the pin 80 being held relative to the stud 20 bythe groove 81 and in the start is in the portion 145 which forms a partof the back end of the buttonhole, that is, the part which is furthestfrom the edge of the garment. The part 146 holds the pin in a positionsothat the vibrator will vibrate the work clamp up one side of the slitwhich is being made by the knife for the buttonhole. The part 147 thencauses the pin 80 to move nearer to the stud 20, and this causes thefirst part of the loop or eyelet to be made, and the part 1 1-8 causesthe pin 80 to move the farthest away from the stud, and this causes thesemicircular end of the eyelet to be made. The part 149 causes the pin80 to move near to the stud, and this causes the completion of theeyelet. The pin is then held in position by the part 100' until thevibrating of the work clamp down the other side of the slit completesthe button-hole by the pin going to its original position in the portion1&5. This operation forms what is known by the trace as the eyelet orlooped button hole. It will be noted that the cam member 3i) revolves anequal distance at each stroke of the needle, and if the cam 118 wereattached directly toth-e cam member 80 the camllS would move in a circleand would pile up too'many stitches at the end and make a defectivebutton-hole; but by having the cam move in an oval path, this isobviated. Of course it is desirable to have the stitches a little closerat the back end than on the side, but not to the extent which would beproduced if the circular movement were used.

By ri-ferring to the diagrammatic Figs. 36 and 3?, it will be seen moreclearly the advantages gained by the cam 118 moving in an oval pathinstead of the circular path. In these two views I have indicated by thedotted lines 150the movement of the cam member 30 for every ten strokesof the needle or for every ten stitches, and the point where each dottedline 150 touches the semi-circle 151 indicates where the cam 118 wouldbe; for instance, after the first ten stitches it would have moved froma to b and the second ten stitches from Z; to 0 and so on un'til after ahundred and. twenty stitches it would be at m and the first half of thelmton-hole would be'finished, and the reinc Ill?) verse movement wouldunder the same conditions, while the cam 118 is completing the circle,complete the button-hole. The vertical lines 152 represent the forwardmovement of the cam 118 and the horizontal lines the work clamp, and thevertical lines 154 represent the forward movement of the work clamp. Itwill be noted that all of the lines 153 are exactly the same length inboth figures, and when the cam 118 moves from a to b ten stitches arecrowded into the space between a and 0, and when it moves from Z) to aten are made in the space from 0 to p, and so on, and as the cam 118HIUVGS from a to g each of the spaces 155 from n to 25 increases inlength and thus it will be seen that entirely too many stitches arecrowded into the space from n to 0 and 0 to 72 while from g) to g thestitches would be normal and Q to r would not. have sulficient stitches,and r to s and e to t entirely too few, and the exact reverse conditionwould exist while the cam 118 is moving from g to m and the clamp from tto (thus it will be seen that the circular movement gives a very unevenstitching of the lnitton-hole by piling up too many stitches at the backend and entirely too few at the eyelet ench as the distance of travel orspace is greatly increased by the curvature of the eyelet. It will benoted that the work clamp needs to be retarded at the eyelet end inorder to allow more stitches to be made while the eyelet is beingformed, and l accomplish this by having the cam 118 move in an oval pathand by having the minor axis of the oval to the rear of the center ofthe stud 20, as will be seen by referring to Figs. 3, 19 and 37. It willbe noted that the cam 118 follows an oval path, indicated by the line158, and when the cam member 30 moves from a to b the cam moves from (Lto 7), and when the cam member has moved to c the cam has moved to c,and so ion and the clamp has moved from 'n/ to 0 while the cam memberhas moved trom a to b and the cam from a to 7/, and so on. ll will benoted that the spaces n t- 0 are suitable for the back end and the space22 is almost normal and the spaces w and f to 1* are normal, and thespaces r s to 3 -.2' are gradually shortened in order to compensate forthe increased travel or lengthened space to be stitched while the eyeletis being formed and the work clamp at this point is moving in a lineforming a compound curve instead of a straightline, and the retarding offorward movement allows the sewing machine to supply sullicient stitchesto make the eyelet have the proper number of stitches to compare withthe sides of the button-hole. It is understood that the formation of theother side of the button-hole is the exact reverse OTE the movementsshown in the diagrams and that the the work clamp relative to the needland the stud of the attachment, it being under stood that the back endof the button-hole is the beginning of the operation and also the endingof the operation and thatthe back end is made while the wornclamp ismoving forward from 'n to 0 and the sides from o to s and the eyelet endfrom s to .2, or in other words in the operation of making button-holethe work on the button-hole is always in the reverse direction to themovement or" the work clamp. it will be under stood that I have statedfor convenience of illustration that ten stitches are made between eachot' these divisions; but by regulating the screw 8 any number ofstitches can be made between the divisions; and from the foregoing itwill be clearly seen that the oval movement places the stitches veryevenly along the sides of the button-hole and does not overcrowd theends too much, as the space between a and 0 is greater than between itand 0.

I claim as my invention:

1. In an attachment of the character stated, the combination oistitching mechanism including a needle, a workclamp. driving meanscapable 01 travel in an oval path connected with the work clamp forworking the same bacand forth in line with the needle, and meansadjustable for varying the major and the minor axes of said oval path ofsaid driving means.

2. In an attachment of the character stated, aneedle, means for cuttinga but ton-hole in advance of the stitching mechanism, a work clamp meanscapable oi travel in an oval path connected with the work clamp formoving the same back and forth with respect to the stitching mechanismin line with the needle whereby a button-hole is so formed that thestitches are substantially evenly distributed throughout its extent.

3. In an attachment of the character statech the combination ofstitching mechanism including a needle bar and its needle, n'ieans torclan'i iing work lauh means capable of travel in an oval, path connectedwith said work clamp for moving the same back and forth with respect tothe stitching mechanism in line with the needle, a flexible endwisemovable member for supporting a cutter above the work and a cutter linedto said member for slitting the work as said member is flexed by theneedle bar in advance of the stitching operation.

4. An attachment as described in claim 1, characterized by means for sooscillating the work holder as to cause the stitching mechanism to passa thread first through the work as incised and then. through theincision and so on to provide a substantially uniform overstitching orbinding for the raw edge throughout its extent, and means for regulatingthe width or bite of the overstitch.

5. In an attachment of the character stated, the combination ofstitching mechanism including a needle, a work clamp, a stud, a cammember having a driving plate rotatable therewith, a cam plate mountedupon the stud working in conjunction with the driving plate, a diskoperable by the driving plate so as to move in an oval path withrespectto the stud and having its minor axis disposed transversely tothe work clamp, and a cam connected to said work clamp and operableby'said disk for movement in an oval path for reciprocating the workclamp in line with the needle.

6. An attachment as described in claim 5 characterized by the cam platehaving a slot therein formed upon an arc of a circle and a block pivotedto the disc slidable in said slot.

'7. An attachment as described in claim. 5 characterized bymeans forchanging the lengtlis of axes of oval movement of the said cam.

8. An attachment as described in claim 6 characterized by said camoperable to move in an oval path through the instrumentality of saidarc-shaped slot in the cam. plate being so positioned as to have itscenter toward the front. of the attachment and a pin 103 that is causedto move to and from the center of the cam plate faster upon its firstand last quarter turns than upon its second and third quarter turns.

9.An attachmentas described in claim 5 characterized by a ratchet cammounted, upon the stud, a pawl plate for advancing the ratchet cam, andmeans connecting the work clamp with respect to the ratchet cam forvibrating said clamp.

10.. in attachment as described in claim 9 characterized by means forpreventing backward throw of the ratchet cam.

11. An attachment as described in claim 10 characterized by the ratchetcam havinq a determined number of projections to v1- brate the workclamp and double that number of pawl-engaged faces.

12. An attaclunent as described in claim 5 characterized by acuttercarried by the work clamp for making an incision in advance of thestitching mechanism, and means for positively moving the cutter in twodirections.

18. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon andto vibratelaterally, of a stud, a ratchct cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, advancing means arranged to engage the cam at said perforationsto turn the cam step by step,

I means connected to the work clamp and encam mounted on the stud andhaving a central perforation and ten perforations in a circular seriesaround the center, the periphey of the cam having five faces meeting toform five points, advancing means arranged. to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor preventing any backward throw of the perforated cam, and meanscapable of travel in an oval path connected with the work clamp formoving the same back and forth with respect to the stitching mechanism.

15. In an attachment of the character stated, the combination with aframe and a work'clamp mounted to reciprocate thereon and to vibratelaterally, of a. stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, 1 advancing means arranged to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor preventing any backward throw of the perforated cam, means forshifting at'certain periods the pivot of the work clamp to form abutton-hole with an eyelet end, and means capable of travel in an ovalpath connected with the'work clamp for moving the same back and forthwith. respect to the stitching mechanism.

16. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphey of the cam having five faces meeting to form fivepoints, advancing means arranged to engage the cam at said perforationsto turn the cam step by step, means connected to the work clamep andengaging said cam periphery to vibrate the work clamp, means forshifting at certain periods the pivot of the work clamp to form a but--ton-hole with an eyelet end, and means capable 'of travel in an ovalpath connected with the work clamp for moving the same back and forthwith respect to the stitching mechanism.

17. In an attachment of the character stated, the combination with a fnine and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, advancing means arranged to engage the cam at said perforationsto turn the cam step by step, means connected to the work clamp andengaging said cam periphery to vibrate the work clamp, means forpreventing any backward throw of the perforated cam, means for shiftingcertain periods the pivot of the work clamp to form a hutton hole withan eyelet end, means for increasing or decreasing the over-stitch or thelateral throw of the work clamp, and means capable of travel in an ovalpath connected with the work clamp for moving the same back and forthwith respect to the stitching mechanism.

18. In an attachment; of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, advancing means arranged to engage the cam at said perforationsto turn the cam step by step, means connected to the work clamp andengaging said cam periphery to vibrate the work clamp, means forpreventing any back ward throw of the perforated cam, means for shiftingat certain periods the pivot of the work clamp to form a button-holewith aii'eyelet end, means for adjusting the vibrator relative to thestud and needle, and

means capable of travel in an oval path connected with the work clampfor moving the same back and forth with respect to the stitchingmechanism.

19. In an attachment of the character stated, the combination with aframe and a work clamp mounted to-reciprocate there on and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, advancing means arranged to engage the cam at said perforationsto turn the cam step by step, means connected to the work clamp andengaging said cam periphery to vibrate the Work clamp, means forpreventing any backward throw of the perforated cam, means for shiftingat certain periods the pivot of the work clamp to form a button-holewith an eyelet end, means for adjusting the vibrator relative to thestud and needle, means for regulating the length of the button-hole,said regulating means being apable of travel in an oval path connectedwith the work clamp for moving the same back and forth with respect tothe stitching mechanism.

20. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate there'- on and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, a pawl plate. on said stud arranged to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to Vibrate the work clamp, andmeans capable of travel in an oval path connected with the work clampfor moving the same back and forth with respect to the stitchingmechanism.

21. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, a pawl plate on said stud arranged to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor preventing any backward throw of the perforated cam, and meanscapable of travel in an oval path connected with the Work clamp formoving the same back and forth with respect to the stitching mechanism.

29. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of stud, a ratchet cam mounteo on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having the faces meeting to form fivepoints, a pawl plate on said stud arranged to engage the cam at saidperforations to turn the cam step by step, ieans connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor preventing any backward throw of the perforated cam, means forshifting at certain periods the pivot of the work clamp to form a buttonhole with an eyelet end, and means capable of travel in an oval pathconnected with the work clamp for moving the same back and forth withrespect to the stitching mechamsm.

23. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, a pawl plate on said stud arranged to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor shifting at certain periods the pivot of the work clamp to form abutton-hole with an eyelet end, and means capable of travel in an ovalpath connected with the work clamp for moving the same back and forthwith respect to the stitching mechanism.

24. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the studand having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, a pawl plate on said stud arranged to engage the cam at saidperforations to turn the cam step by step, means connected to the workclamp and engaging said cam periphery to vibrate the work clamp, meansfor preventing any backward throw of the perforated cam, means forshifting at certain periods the pivot of the work clamp to form abutton-hole with an eyelet end, means for in- I creasing or decreasingthe overstitch or the lateral throw of the work clamp, and means capableof travel in an oval path connected with the work clamp for moving thesame back and forth with respect to the stitching mechanism.

25. In an attachment of the character stated, the combination with aframe and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having acentral perforation and ten perforations in a circular series around thecenter, the periphery of the cam having five faces meeting to form fivepoints, a pawl plate on said stud arranged to engage the cam at saidperforations to turn the cam step by step, a vibrator connected to thework clamp and engaging said cam periphery to vibrate the work clamp,means for preventing any backward throw of the perforated cam, means forshifting at certain periods the pivot of the work clamp to form abutton-hole with an eyelet end, means for adjusting the vibratorrelative to the stud and needle, and means capable of travel in an ovalpath connected with the work clamp for moving the same back and forthwith respect to the stitching mechanism.

Signed at New York, in the county of New York and State of New York,this 8th day of February, A. D. 1918.

ALBERTUS B. MATTINGLY.

Witnesses:

CHAS. W. LA RUE, WALTER H. HUSTED.

